/**
* appends the selected layers of a WMS to the passed <code>ViewContext</code>
*
* @param context
* @throws ContextException
* @throws MalformedURLException
* @throws PortalException
* @throws InvalidCapabilitiesException
*/
private void appendWMS(RPCWebEvent rpc, ViewContext context)
throws MalformedURLException, ContextException, PortalException,
InvalidCapabilitiesException {
RPCStruct struct = (RPCStruct) rpc.getRPCMethodCall().getParameters()[0].getValue();
URL url = new URL((String) struct.getMember("WMSURL").getValue());
String name = (String) struct.getMember("WMSNAME").getValue();
String version = (String) struct.getMember("WMSVERSION").getValue();
String layers = (String) struct.getMember("LAYERS").getValue();
String formatName = (String) struct.getMember("FORMAT").getValue();
boolean useAuthentification = false;
if (struct.getMember("useAuthentification") != null) {
String tmp = (String) struct.getMember("useAuthentification").getValue();
useAuthentification = "true".equalsIgnoreCase(tmp);
}
List<String> list = StringTools.toList(layers, ";", true);
WMSCapabilitiesDocument capa = null;
try {
StringBuffer sb = new StringBuffer(500);
if ("1.0.0".equals(version)) {
sb.append(url.toExternalForm()).append("?request=capabilities&service=WMS");
} else {
sb.append(url.toExternalForm()).append("?request=GetCapabilities&service=WMS");
}
if (useAuthentification) {
HttpSession session = ((HttpServletRequest) getRequest()).getSession();
String user =
((org.apache.jetspeed.om.security.BaseJetspeedUser)
session.getAttribute("turbine.user"))
.getUserName();
String password =
((org.apache.jetspeed.om.security.BaseJetspeedUser)
session.getAttribute("turbine.user"))
.getPassword();
if (!"anon".equals(user)) {
sb.append("&user="******"&password="******"GetCapabilites for added WMS", sb.toString());
capa = WMSCapabilitiesDocumentFactory.getWMSCapabilitiesDocument(new URL(sb.toString()));
} catch (Exception e) {
LOG.logError(e.getMessage(), e);
String msg = null;
if ("1.0.0".equals(version)) {
msg =
StringTools.concat(
500,
"could not load WMS capabilities from: ",
new URL(url.toExternalForm() + "?request=capabilities&service=WMS"),
"; reason: ",
e.getMessage());
} else {
msg =
StringTools.concat(
500,
"could not load WMS capabilities from: ",
new URL(url.toExternalForm() + "?request=GetCapabilities&service=WMS"),
"; reason: ",
e.getMessage());
}
throw new PortalException(msg);
}
WMSCapabilities capabilities = (WMSCapabilities) capa.parseCapabilities();
String rootTitle = capabilities.getLayer().getTitle();
// ----------------------------------------------------------------------------
// stuff required by layerlist tree view
Node root = context.getGeneral().getExtension().getLayerTreeRoot();
// check if Node width this title already exists
Node[] nodes = root.getNodes();
int newNodeId = -1;
for (int j = 0; j < nodes.length; j++) {
if (nodes[j].getTitle().equals(rootTitle)) {
newNodeId = nodes[j].getId();
break;
}
}
if (newNodeId == -1) {
newNodeId = root.getMaxNodeId() + 1;
Node newNode = new Node(newNodeId, root, rootTitle, true, false);
Node[] newNodes = new Node[nodes.length + 1];
newNodes[0] = newNode;
for (int j = 0; j < nodes.length; j++) {
newNodes[j + 1] = nodes[j];
}
root.setNodes(newNodes);
}
// ----------------------------------------------------------------------------
for (int i = 0; i < list.size(); i++) {
String[] lay = StringTools.toArray(list.get(i), "|", false);
Server server = new Server(name, version, "OGC:WMS", url, capabilities);
String srs = context.getGeneral().getBoundingBox()[0].getCoordinateSystem().getPrefixedName();
Format format = new Format(formatName, true);
FormatList fl = new FormatList(new Format[] {format});
// read available styles from WMS capabilities and add them
// to the WMC layer
org.deegree.ogcwebservices.wms.capabilities.Layer wmslay = capabilities.getLayer(lay[0]);
org.deegree.ogcwebservices.wms.capabilities.Style[] wmsstyles = wmslay.getStyles();
Style[] styles = null;
if (wmsstyles == null || wmsstyles.length == 0) {
// a wms capabilities layer may offeres one or more styles for
// a layer but it don't have to. But WMC must have at least one
// style for each layer; So we set a default style in the case
// a wms does not declares one
styles = new Style[1];
styles[0] = new Style("", "default", "", null, true);
} else {
styles = new Style[wmsstyles.length];
for (int j = 0; j < styles.length; j++) {
boolean isDefault =
wmsstyles[j].getName().toLowerCase().indexOf("default") > -1
|| wmsstyles[j].getName().trim().length() == 0;
ImageURL legendURL = null;
LegendURL[] lUrl = wmsstyles[j].getLegendURL();
if (lUrl != null && lUrl.length > 0) {
legendURL =
new ImageURL(
lUrl[0].getWidth(),
lUrl[0].getHeight(),
lUrl[0].getFormat(),
lUrl[0].getOnlineResource());
}
styles[j] =
new Style(
wmsstyles[j].getName(),
wmsstyles[j].getTitle(),
wmsstyles[j].getAbstract(),
legendURL,
isDefault);
}
}
StyleList styleList = new StyleList(styles);
BaseURL mdUrl = null;
MetadataURL[] mdUrls = wmslay.getMetadataURL();
if (mdUrls != null && mdUrls.length == 1 && mdUrls[0] != null) {
mdUrl = mdUrls[0];
}
int authentication = LayerExtension.NONE;
if (useAuthentification) {
authentication = LayerExtension.USERPASSWORD;
}
LayerExtension lex =
new LayerExtension(
null,
false,
wmslay.getScaleHint().getMin(),
wmslay.getScaleHint().getMax(),
false,
authentication,
newNodeId,
false,
null);
Layer newLay =
new Layer(
server,
lay[0],
lay[1],
null,
new String[] {srs},
null,
mdUrl,
fl,
styleList,
wmslay.isQueryable(),
false,
lex);
if (context
.getLayerList()
.getLayer(newLay.getName(), server.getOnlineResource().toExternalForm())
== null) {
context.getLayerList().addLayerToTop(newLay);
}
}
try {
XMLFragment xml = XMLFactory.export(context);
System.out.println(xml.getAsPrettyString());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* Layers may include a <ScaleHint> element that suggests minimum and maximum scales for
* which it is appropriate to display this layer. Because WMS output is destined for output
* devices of arbitrary size and resolution, the usual definition of scale as the ratio of map
* size to real-world size is not appropriate here. The following definition of Scale Hint is
* recommended. Consider a hypothetical map with a given Bounding Box, width and height. The
* central pixel of that map (or the pixel just to the northwest of center) will have some size,
* which can be expressed as the ground distance in meters of the southwest to northeast diagonal
* of that pixel. The two values in ScaleHint are the minimum and maximum recommended values of
* that diagonal. It is recognized that this definition is not geodetically precise, but at the
* same time the hope is that by including it conventions will develop that can be later specified
* more clearly.
*
* @return the scale hint
*/
public ScaleHint getScaleHint() {
if ((parent != null) && (scaleHint == null)) {
return parent.getScaleHint();
}
return scaleHint;
}